foodge
I have owned:
Allwaves - 9'10 + 9'6 + 8'10
Cabrinah (Fusion) 10'8
I am 65, 48 yrs surfing, 3rd year SUS, currently 93 k
A lot depends on how you surf and how your balance is now.
If your balance skills are weak... go bigger & wider (nose & tail)
If you are pretty comfortable on a SUP as a newbie... go smaller and expect a few weeks of discomfort.
The trade off is: you will get a board that will suit you for a while. Important, since you are not talking about entry level priced boards.
I really like your board choices. They are all good and have different qualities.
Lopez 10x34 - super stable, easy learner... but you may outgrow quickly
Al Merrick Caddie 10' - Never seen one but love the way Chris Griffith surfs the 9'7 here
it's a Older design by a great shaper that does lot well - turning and noseriding
Fusion 10' (I think you mean 10'2 x 32) is a really nice board and will be an fairly easy learner. I have not surfed the 10'2, but my experience with the 10'8 was that it did not noseride at all.... on a board that size... I want to noseride. I sold it in 30 days, and picked up the Allwave 9'10 as my "Big" board
I have lost weight along the way and keep downsizing. I am currently on the Allwave 8'10 but could easily move to the Allwave 8'6.
My respect for the Allwaves is well documented here because I think they are a perfect board for many of us in similar situations... ie:
Good surfers that are getting older, hence we like performance
and stability

Why I like the Allwave
The wider nose and tail coupled with thicker rails make even the 8'6 very stable
The Tail rocker makes it turn like a shortboard... it can be surfed in a fixed stance (but who would want to?)
The wide concave nose makes it an EXCELLENT noserider ( I have hung 10 twice on my 8'10)
The HRS construction is tough
The new models have the best handle I have ever seen... but so do the JP's

I have surfed weak 1' waves and juicy overhead this week on my Allwave 8'10... perfect in all conditions
It carries speed in mush and holds like glue in the juice.
Added bonus... they flat-water paddle extremely well - I do daily 6 mile paddles on my 9'6 Allwave daily if no surf
My recommondation:
If you want performance -push yourself a bit - demo the 9'2 Allwave
I surfed the 9'2 last week and it felt
very big & stable coming off my 8'10... I think you would quickly adapt.
Each size in the Allwave line is a geometric step... similar.... but very noticeable performance levels.
If you are really looking for easier learning and a board that will grow with you... the 9'6 Allwave & 10'2 Fusion are a toss up.. if you can go carbon on the JP... the scales would tip JP
if you have deep pockets.
Here's a good video of the 8'6 Allwave in small weak waves with 1 nice set wave. It shows the versatility of ripping and noseriding.